How to Remove Urine Smell From Laundry | Steps That Work

Urine odors in clothes, sheets, and diapers are stubborn, but a few pre-soak methods remove them completely. The key is treating the fabric before washing and never moving to the dryer until the smell is gone. Most cases are fixed with one of three soaking routes, followed by a warm wash cycle.

Why Urine Smell Can Survive A Normal Wash

Urine contains uric acid, a compound that binds tightly to fabric fibers. Regular wash cycles often move the odor around without breaking the bond, so the smell reappears as the fabric warms up — usually when your body heat hits it again. That’s why a pre-soak in an acidic or oxygenating solution makes the difference between fresh laundry and laundry that smells fine in the basket but not on you.

Heat is the enemy. Drying urine-stained fabric before the odor is fully gone bakes the smell in, making it far harder to remove. So the rule is simple: smell the item after washing, and if any odor remains, repeat the soak and wash before drying.

Soaking Methods That Remove Urine Odor

Soak the fabric before washing. Three techniques work best depending on whether the urine is fresh or dried:

• For fresh urine: Tide recommends soaking the item in a sink or tub with baking soda and warm water for 15 minutes, then washing on the normal cycle at the warmest temperature the care label allows.
• For set-in or strong odors: Maytag suggests soaking with vinegar and hot water for at least 1 hour, or overnight. The acid neutralizes the uric acid that causes the smell.
• For old, dried stains: Maytag recommends soaking with color-safe oxygen bleach and cool water for at least 30 minutes, following package directions, then washing in the warmest water safe for the fabric.

Dreft’s guidance for diapers, clothing, and bedsheets is a 1:1 mix of cold water and white distilled vinegar, soaking for at least 30 minutes before washing in the warmest water the fabric accepts. For dried-in stains, Dreft says to soak in cool water with oxygen-based bleach for at least 30 minutes, or overnight if needed.

One thing to note: white vinegar and baking soda both work, but different sources use them in separate steps. Don’t assume they need to be mixed together. Each works on its own.

Washing And Drying Urine-Soaked Fabrics

After the soak, wash the item immediately using a good-quality detergent on the normal cycle. Set the machine to the warmest temperature listed on the care label — hot water helps break down urea, but only if the fabric can handle it. Delicates and certain synthetics may require cold, so always check the tag first.

Drying matters just as much. When the wash cycle finishes, smell the fabric before putting it in the dryer. If the odor is gone, dry completely — machine-dry with dryer sheets, or air-dry on a line or flat surface. If the smell persists, repeat the soak and wash. Never skip this recheck, because heat sets the odor permanently.

If you’re dealing with multiple loads or tough cases, our picks for the best detergents for urine smell compare enzyme-based formulas that break down uric acid more aggressively than standard detergents.

Urine Smell Removal Quick Reference

Common mistakes that leave odor behind are easy to avoid: drying too early, using cold water when the fabric can handle heat, and skipping the repeat wash when the smell persists. If odor remains after washing, pre-soak again and rewash rather than moving to the dryer. Oxygen bleach must be color-safe and used per package directions, and the care label is always the final word on wash temperature. These methods apply to washable clothing, bedsheets, diapers, and any other urine-soaked fabric.